With extremely low power consumption of  <120 MW and a volume of <17 cc, Microchip’s CSAC SA65 brings the accuracy and stability of an atomic clock to portable applications.

Replacing the CSAC SA.45s 10MHz, the CSAC provides RF and 1PPS outputs at standard CMOS levels, with short-term stability (Allan Deviation) of 3.0 x 10-10 at t = 1 sec, typical long-term aging of <9 x 10-10/month, and maximum frequency change of ± 3 x 10-10 over the operating temperature range of -40°C to 80°C.

The CSC accepts 1PPS input that may be used to synchronise the unit’s 1PPS output to an external reference clock with ± 100 nanosecond accuracy.  CSAC is also able to discipline its phase and frequency to the external reference.

Comprehensive control, monitoring and calibration of the SA65 is accomplished via a standard CMOS-level RS-232 serial interface built into the SA65. The interface is also used to set and read the CSAC’s internal time-of-day clock.

Microchip’s CSAC SA65 provides wide operating temperatures, fast warm-up/atomic-lock and superior frequency stability in extreme environments. Suitable for military and industrial systems requiring ultra-high precision and low-power consumption, the SA65 is form-, fit- and function-compatible with the SA.45s, while improving performance and environmental insensitivity.

• GPS receivers
• Backpack radios
• Anti-IED jamming systems
• Autonomous sensor networks
• Unmanned vehicles
• Underwater sensor systems
• Stability for various other communications and transmission applications

microchip-csac-sa65-1.pdf